Exercise 2 Consider a mass m, connected to a spring of stiffness k, which is connected to a fixed wall. Write down the dynamical equation of motion on its differential form and if xo= 4m, vo= 4m/s and w = 2 Hz. Show that the general motion of the block of mass m can be expressed as: x(t)=(2-i)e" + (2 + 1)e-2it